Visio has a nice feature: the stencil files (VSS). Those files are used to group
a set of images related to each other and are mostly equivalent to "gallery
themes" in openoffice.org.
Those VSS files are valuable because now 3rd parties companies produce VSS files
to help there customers draw schemas. For example, Cisco provides many stencils
for all its hardware:
http://www.cisco.com/en/US/products/prod_visio_icon_list.html
It would be nice if OOo provided such kind of files where the user would just
double-click on the stencils or drop the files somewhere, and those would be
automagically added to the gallery.
I think that this is a strategic feature, as it impacts 3rd parties companies.
Note: At the moment, Kami does this by developping an extension (OXT), with SDG
files. Maybe a dedicated extension would be better.
Note: it should be possible to do such stencils with ODG, SVG... (issue 58870,
issue 48702)

note: stencils a not just gallery item!
This subsystem must have two special abilities:
1) ability to have hot points within stencil to manipulate internal proportions
or positions of parts of this stencil (like in arrow tool we have yellow point
to manipulate with of arrow's body and angle in arrow's head). And i think there
are must be some script that will be react to this handle point's moving. Or,
for spare users from programming, it may be smart visual geometry linking, like
it possible in "Geometer's Sketchpad" (http://www.keypress.com/x5521.xml)
2) ability to have non-standart link points to use chains (or how it named in
English interface?) in proper places on the stencil, not only in four hot points
in the middle of they sides. By the way, in block arrows side point looks ugly.

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